1928 C.H. Barkdull - 2 manuscript maps of Sierra County mining operations
2 fascinating manuscript maps of Sierra County mining operations
Plat of the Pilgrim Vein; Plat of the Placer and Lode Claims of the Pilgrim Mine
C. H. Barkdull; Bonanza King Mining Co.
Oakland, CA, 1928
21.6 x 33 cm (8.5 x 13 in); 38 x 63 cm (15 x 25 in)
Manuscript on vellum
2 mining maps:
1) One-of-a-kind manuscript map of an actual gold and silver vein in Sierra County, CA, drawn by mining engineer Calvin Barkdull. Pilgrim vein is located in the W½SE¼ sec. 29, T19N, R11E, MDM, along Wolf Creek (4 miles ENE of Alleghany), on National Forest land. As depicted on the map, mineralization is a vein deposit hosted in slate.
The map is an interesting view of the organizational structure of mining operations, complete with a geological cross section, tunnel system, camp layout, and clear legend.
It is also a representation of an important historical process, namely a 20th century boom in mining that took place in the West. Compared with the momentous 19th century California gold rush and silver operations in Nevada, this wave is largely forgotten. As evidenced by this map, which was produced under the Bonanza King Mining Company, mining in these years was “big business” rather than the work of smaller, independent prospectors. Post-1920 mining in the Mojave Desert typically saw corporations running mines and processing centers, and company-run towns developing around these industrial centers.
2) Precise surveyor's map of operations at several mines, again an important view of organizational structure, including the use of preexisting water mills from the earlier Gold Rush era.